Duplicating machine for selective printing



Nov. 17, 1959 w. RITZERFELD EI'AL 2,912,927

DUPLICATING MACHINE FOR SELECTIVE PRINTING Filed April 1a, 1958 2Sheets-Sheet l DUPLICATING MACHINE FOR SELECTIVE PRINTING Filed April16. 1958 W. RITZERFELD EI'AL Nov. 17, 1959 2 Sheets-Sheet g haw UnitedStates Patt DUPLICATING MACHINE FOR SELECTIVE PRINTING WilhelmRitzerfeld, Berlin-Dahlem, and Gerhard Ritzerfeld, BerIin-Grunewald,Germany The present invention is a continuation-in-part application ofour co-pending application Serial No. 620,- 546, filed on November 5,1956, now US. Patent No. 2,860,574.

The present invention relates to a duplicating machine for selectiveprinting of desired sections or lines of a printing form, and relatesmore particularly to a duplicating machine of the type in which selectedprinting sec: tions of a printing form are printed in adjacent positionson a copy sheet, although the printing sections may be spaced from eachother on the printing form.

Duplicating machines of this type are known, in which an electromagneticmeans urges a pressure roller against a printing roller which carriesthe printing form.

It is one object of the present invention to overcome certaindisadvantages of duplicating machines of this type, and to provide aduplicating machine which permits selective printing of sections of aprinting form under.

control of manually operated selector members.

Another object of the present invention is to provide a duplicatingmachine of this type which is of very simple construction and can beinexpensively manufactured.

Another object of the present invention is to provide a duplicatingmachine of this type in which during each revolution of the printingroller, a selected first printing section is reproduced, whereas duringeach successive revolution of the printing roller successive differentsections of the printing form are reproduced on the copy sheet adjacentthe continuously repeated first printing section. 1

Another object of the present invention is to provide a duplicatingmachine having shiftable selector means by which the machine can be setto repeated printing of selected sections of the printing form, or toautomatic printing of different successive sections of the printingform.

Another object of the present invention is to provide the manuallyoperated portions of the selector members on the side of the machinefrom which the copy sheets are fed to the printing roller.

, With these objects in view, the present invention mainly consists in aselector mechanism for use with a duplicating machine which comprises arotary printing roller, a printing form secured to the printing rollerand having a plurality of printing sections, a rotary pressure rollercooperating with the printing roller, and operating means for moving thepressure roller to and from a printing position in close proximity tothe printing roller. Copy sheets fed into the printing line between thetwo rollers, are transported by the turning rollers in the printingposition of the rollers, but when the pressure roller is spaced from theprinting roller, a holding means holds the copy sheet stationary, sothat when the pressure roller is again moved to printing position, aspaced printing section of the printing form is printed on the copysheet adjacent the first printed printing section.

In the duplicating machine according to the present 2 invention, theoperating means include electromagnetic means which actuate the pressureroller to move to printing position when the electromagnetic means isenergized.

The selector mechanism according to the present invention includes atleast one rotary carrier; switch means mounted on the carrier and'havingan engaging portion moving along a circular path during rotation of thecarrier, 21 set of manually operable selector members arranged in acircle and being independently movable in axial direction of the carrierbetween an inoperative position, and an operative position projectinginto the path of movement of the engaging portion of the switch means;and means connecting the carrier with the printing roller for rotationin timed relation so that each printing section of the printing form islocated opposite the pressure roller when the associated selector memberin operative position engages and actuates the switch means.

The switch means is electrically connected to the electromagentic means,and energizes the same'when actuated by a selector member during turningmovement of the carrier. Since at the moment: in which any selectormember closes the switch means and energizes the electromagnetic means,the respective printing section associated with the actuated selectormember is located opposite the pressure roller, this selected printingsection is printed when the electromagnetic means moves the pressureroller to printing position.

An important feature of the present invention is the mounting of theselector members for movement in axial direction of the rotary carrierwhereby a radial movement of the actuated switch means is obtained.

In the preferred embodiment of the present invention a second rotarycarrier is provided, which can be connected to the first carrier in aplurality of angularly displaced positions respectively associated withthe printing sections; Thesecond carrier also carries a switch means, sothat the relative position between the two switch means on the twocarriers can be varied as desired- Since eachselector member is movableto a position engaging both switch means, two different printingsections can be reproduced-on the copy sheet under control of a singleselector member.

Preferably,.each selector member-"is shiftable between a positionengaging only one switch, another position engaging both switches, and athird position engaging only the other switch. V

In the preferred er n-boclimentv of the present invention, thetwocarriers are interconnected by a spring loaded stepping mechanism, whichis automatically operated during eachrevolution of the carrier Thestepping mechanism etfects step-wise turning of one carrier relative tothe other carrierwhen actuated. Consequently it is possible to reproducethe same printing section during each revolution of the carriers underthe control of the switch means on the carrier which is driven, whereasdifierent successive printing sections are reproduced 'on the copy sheetunder the control of the switch means on the other carrier, such othercarrier being step-wise turned at the end of each revolution.

The novel features which are consideredas characteristic for theinvention are set forth in particular in the appended claims. Theinvention itself, however, both as to its construction and its method ofoperation, together with additional objects and advantages thereof, willbe best understood from the following description of specificembodiments When-read in connection with the accompanying drawings, inwhich: I Figure 1 is a side View of .an embodiment of the presentinvention, partly shown .in'section, and one of the side walls of themachine being omitted for the sake of clarity; Y

Figure 2 is a fragmentary sectional view on an enlarged scale and takenon line 2-2 in Figure 1; and

Figure 3 is a schematic view including a diagram showing the electriccircuit of the apparatus.

Referring now to the drawing, and more particularly to Figure 1, aprinting roller 1 is turnably' mounted on a shaft 3, and is driven froma motor, not shown, through a chain 6 passing over a chain wheel 4 whichis secured to'printing roller 1 for rotation therewith. In a recess 81.of. the printing roller 1, clamping means, not shown,- are mounted forclamping a printing form to the peripheral surface of the printingroller 1. The printing form is'a duplicating master sheet which has aplurality of printing sections Z1 to Z10. For example, printing sectionZ1 may be the heading of a printed text, and the other printing sectionsmay contain lines of text.

A pressure roller 10 is mounted on a pair of pivoted supporting arms 82for movement toward'and away from the printing roller, and is controlledby operating means which include a toggle'lev'er means 16, 17 which inthe illustrated position hold the pressure roller 10 spaced from theprinting roller, but are movable to a straightened position in which thepressure roller is in a printing position in close proximity to theprinting roller and engaging the same, or the master sheet thereon alonga printing line which is located in a plane passing through the axes ofthe rollers 1 and 10 as indicated in dash and dot lines in Fig. 1.

. Transporting rollers 22 and 23 feed the'copy sheet 21 from a tabletoward the holding means 72. A moistening device 83 is provided formoistening the copy sheet 21, as is required for 'hectographicduplicating. When a copy sheet reaches the printing line, it does notmove because it is held by the holding means 72. When the pressureroller 10 is moved to its printing position, the copy sheet is engagedby the rollers 1 and 10 and transported. When the pressure roller 10 isagain retracted the copy sheet stops due to the action of the holdingmeans 72, while the printing roller continues its turning movement sothat difierent printing sections Z1 to Z10 move to a position locatedopposite the -pressure roller 10. When the pressure roller 10 is movedto printing position, the respective printing section is printed on thecopy sheet, and since the copy sheet remains stationary during theturning of the printing roller 1, the next selected printing section isprinted adjacent to the first printed printing section on the copy sheetwhen the pressure roller is again moved to printmg position.

.Thevoperating toggle levers 16 and 17 are actuated by a rod 49 which isconnected to the core of an electromagnetic means 28. Whenelectromagnetic means 28 s energized, the pressure roller 10 moves toits printmg position.

- The circuit of the electromagnetic'means 28 is shown t in Figure 3from which it is apparent that a source of alternating current suppliesa transformer 72 whereupon the alternating current is rectified by arectifier 73. If an electric connection is made between the rectifierand the electromagnetic means 28, the electromagnetic means will beenergized, and the pressure roller will be moved to its printingposition.

The energizing of the electromagnetic means is controlled by a selectordevice which is driven in timed relation with the printing roller 1. Abevel gear 61 is fixedly mounted on the printing roller 1, and drivesthrough a meshing bevel gear 60 a shaft 59 which is mounted in bearings59a. A first rotary carrier 57 includes a hub portion provided with twoslip rings 65 and 66, anda flange portion 57a whose shape is best seenin 'Figure 2. The carrier 57 is fixedly connected to shaft 59, andperforms the same number of revolutions as the printing roller 1.Carrier 57 carries a first switch means 55 which has a resilientengaging portion 55a.

' A second carrier 58 is mounted on shaft 59 -f01' m.-

ing movement relative to the first carrier 57, but is normally coupledto carrier 57 by a spring loaded stepping mechanism which includes aratchet wheel 64, a stepping pawl 62 urged by a spring 71 intoengagement with the coupling wheel 64, and controlled by a spring loadedpawl 63, and a spiral spring connected to carrier 58 and to shaft 59,and urging carrier 58 to turn relative to carrier 57. Such turning,however, is normally prevented due to the engagement between. pawl 62which is mounted on carrier 57, and coupling wheel 64 which is mountedon carrier 58. A knob 58a is secured to carrier 58 and permits turningof the carrier 58 relative to carrier 57 by a manual operation.

Carrier 58 also has a hub portion provided with two slip rings 67 and68, and a flange portion corresponding to the shape of flange 57a, andcarrying a second switch means 56. The outermost engaging portions ofswitch means 55 and 56 are spaced the same radial distance from the axisof shaft'59.

The pair of slip rings 65, 66 is connected to thetwo contacts of springmeans 55 by wires 84, and the contacts of switch means 56 are connectedby wires 85 to slip rings 67 and 68. The slide contacts 65:: and 66a,and the slide contacts 67a and 68a are connected in parallel and arearranged in the circuit of electromagnetic means 28, as best seen inFigure 3. Therefore, closing of either switch 55, or switch 56, willenergize electromagnetic means 28. A manually operated switch 74 isconnected into the circuit in series with switch 55 and another manuallyoperated switch 75 is connected in series with switch 56.

When both switches 74 and 75 are closed, actuation of both switches 55and 56 will effect energization of electromagnetic means 28. However,byoperation of the respective switch 74 and 75, switches 55 and 56 canbe selectively disconnected from the circuit so that electromagneticmeans 28 will not energize when the respective disconnected switch 55,or 56 is closed.

A stationary support 52 is located adjacent carrier 53, and has arrangedin a circle a plurality of guideways 52:: which extend in axialdirection of shaft 59 and the carriers 57, 58. Each guideway 52aslidably supports a selector-member 51 which has a manually operatedportion provided with a button located on the side of the support plate52 which is remote from the carriers 57 and 58. Each selector member 51carries a roller 51a which cooperates with the engaging portions 55a ofthe first and second switch means 55 and 56. Each selector member 51 isshiftable by a manual operation from the inoperative position shown insolid lines in Figure l to a plurality of operative positions shown indash and dot lines in Figure 1. In the most advanced position, theroller 51a engages only the engaging portion of switch 55, in anintermediate position roller 51a engages the engaging portions of bothswitches 55 and 56, and in a third operative position the roller 51 mayonly engage the engaging portion of switch 56 during rotation of thecarriers 57 and 58.

Arresting means are provided for arresting each selector member 51 inits positions, and preferably include a ball 53 urged by a spring 54into recesses on the shank of the respective selector member 51. Thenumber of recesses in the selector members corresponds to the number ofdesired operative positions, and one recess is provided for holding therespective selector member in its illustrated inoperative position.

A control member 69 is mounted on a stationary support shiftable betweenan inoperative position and an operative position shown in dash and dotlines in Figures 1 and 2. The control pawl 63 is engaged by controlmember 69 in its operative position when carrier 57 rotates. Thisresults in a release of the ratchet pawl 62 from the ratchet wheel 64,and in turning of the carrier 58 relative to carrier 57 under the actionof spring 7t). However, carrier 58 can only turn one step since controlpawl 63 is immediately released by control member 69, and permits returnof locking pawl 62 into its locking position engaging the ratchet wheel64.

The stepping mechanism 62, 63, 64 is so designed that each angularlyturned position of carrier 58 corresponds to a different printingsection Z1 to Z10 on theprinting form 2.

In the same manner, each of the selector members 51 is associated with adifferent printing section Z1 to Z10 on the printing form.

The machine operates in the following manner:

If one, or several selector members 51 are manually shifted to therespective most advanced operative positions in which the roller orrollers 51a engage only the engaging portion of switch means 55, everytime the engaging portion 55a is engaged by a roller 51a, the switch 55is closed, and the electromagnetic means 28 is energized to effectmovement of the pressure roller 10 to its printing position. Sincecarrier 57 rotatesat the same rotary speed as printing roller 1, 'aprinting section selected by operation of the respective associatedselectormember :1 is printed on the copy sheet. Thereupon the pressureroller is automatically retracted by spring means, not shown, and thecopy sheet remains stationary until the next selected printing section Zis located opposite the pressure roller 10. At this moment switch meansis again closed by another preset selector member 51, and theelectromagnetic means is again energized so that the pressure roller 10is shifted to printing position and the respective selected printingsection of the printing form is printed on the copy sheet adjacent thefirst selected printing section. During this operation, the switch 56 isnot actuated, and consequently can be disconnected by switch 75.

In another operative position of the selector mem bers, the roller 51ais located in the circular paths of both engaging portions of the twoswitches 55 and 56. Consequently, both switches will be simultaneouslyactuated by preset selector members 51. If control mem ber 69 is held inits inoperative position, the operation of the device will be the sameas if only switch means 55 were actuated.

However, if control member 69 is set to its operative position, itengages the control pawl 63 shortly before the end of each revolution ofprinting roller 1 and carrier- 57, and effects temporary release of thecoupling wheel 64 by locking pawl 62, so that carrier 58 is free to turnunder the action of spring in a direction opposite to the direction ofrotation of carrier 57 which is indicated by the arrow D in Figure l.The design and construction of the stepping mechanism is such, thatafter each step, the spring 56 is spaced from spring 55 an angulardistance which corresponds to the angular spacing of the selectormembers 51.

Consequently, assuming that switches 55 and 56 were aligned in axialdirection during the first revolution of printing roller 1, only asingle selected portion would be printed on the copy sheet assuming thatonly one selector member was previously set to its operative positionengaging both switches 55 and 56. During the second revolution, carrier58 is already shifted one step relative to carrier 57, and consequentlythe roller 51a will first engage switch 55, closing the same andeffecting printing of the associated selected printing section, and willthen engage the engaging portion of switch 56, closing switch 56, andeffecting printing of the next following printing section of theprinting form adjacent the imprint of the first selected printingsection.

For example, if selector member 51 associated with the printing sectionZ1 is preset to operative position, only the printing section Z1 will beprinted during the first revolution of the printing roller. During thesecond revolution, printing of the printing section Z1 will be repeatedunder control of switch 55, whereas printing section Z2 will be printedunder control of switch 56.

During the next following third revolution of the printingroller,printing of the printing section Z1 will be repeated, but since carrier58 has turned another step, the printing section Z3 will'be printed onthe copy sheet under control of switch 56, and such imprint will'appearon the copy sheet adjacent the imprint of the printing section Z1.

Consequently the apparatus of the presentinvention permits printing of acommon headportion Z1, together with successive lines of the printingform.

The knob 58a permits relative turning of the carrier 58 by a manualoperation, so that lines of the printing form can be selected beforeeach revolution of the printing roller. It is also possible to place theselector member 51 which is associated with the head portion of theprinting form into its most advanced operative position actuating onlyswitch 55 during each revolution, and to set several selector members 51in the operative position engaging only switch 56 whereby several linesare printed on the copy sheet in addition to the head portion. .Duringthis type of operation, the control member 69 remains in retractedinoperative position.

It will be understood that each of the elements described above, or twoor more together, may also find a useful application in other types ofduplicating machines differing from the types described above.

While the invention has been illustrated and described as embodied in aduplicating machine for selective printing of successive sections of aprinting form, it is not intended to be limited to the details shown,since various modifications and structural changes may be made withoutdeparting in any way from the spirit of the present invention. 7

Without further analysis, the foregoing will so fully reveal the gist ofthe present invention that others can by applying current knowledgereadily adapt it for various applications without omitting featuresthat, from the standpoint of prior art, fairly constitute essentialcharacteristics of the generic or specific aspects of this inventionand, therefore, such adaptations should and are intended to becomprehended within the meaning and range of equivalence of thefollowing claims.

What is claimed as new and desired to be secured by Letters Patent is:

1. In a duplicating machine, in combination, a rotary printing roller;means for securing to said printing roller a printing form having aplurality of printing sections; drive means for rotating said printingroller; a rotary pressure roller cooperating with said printing roller;movable support means for supporting said pressure roller for movementto and from a printing position in close proximity to said printingroller; operating means connected to said movable support for moving thesame and thereby said pressure roller to and from said printingposition, and including electromagnetic means; means for feeding a copysheet-between said rollers, and for holding the copy sheet stationarywhen the same is not transported by said rollers in said printingposition;

at least one rotary carrier; switch meansmounted on said carrier andhaving an engaging portion moving along a circular path during rotationof said carrier, said switch means being electrically connected to saidelectro-magnetic means and being movable to an actuated position forcontrolling said electromagnetic means to actuate said operating means;a support located adjacent said rotary carrier; a set of manuallyoperable selector members mounted along a circle on said support formovement independently of each other in axial direction of said carrierbetween an inoperative position, and an operative position projectinginto the path of movement of said engaging portion of said switch means,each selector member in operative position engaging said engagingportion of said switch means during rotation of said carrier for movingsaid switch means to said actuated position, said selector members beingrespectively associated with said printing sections; and meansconnecting said carrier with said printing roller for rotation in timedrelation so that each printing section of said printing form is locatedopposite said pressure roller when the associated selector memberactuates said switch means whereby printing sections selected byoperation of the respective selector member are printed adjacent eachother on the copy sheet.

2. In a duplicating machine, in combination, a rotary printing roller;means for securing to said printing roller a printing form having aplurality of printing sections; drive means for rotating said printingroller; a rotary pressure roller cooperating with said printing roller;movable support means for supporting said pressure roller for movementto and from a printing position in close proximity to said printingroller; operating means connected to said movable support for moving thesame and thereby said pressure roller to and from said printingposition, and including electromagnetic means; means for feeding a copysheet between said rollers, and for holding the copy sheet stationarywhen the same is not transported by said rollers in said printingposition; at least one rotary carrier having an axis of rotationtransverse to the axis of rotation of said printing roller; switch meansmounted on said carrier and having an engaging portion moving along acircular path during rotation of said carrier, said switch means beingelectrically con nected to said electromagnetic means and being movableto an actuated position for controlling said electromagnetic means toactuate said operating means; a support located adjacent said rotarycarrier; a set of manually operable selector members mounted along acircle on said support for movement independently of each other in axialdirection of said carrier between an inoperative position, and anoperative position projecting into the path of movement of said engagingportion of said switch means, each selector memberinoperative positionengaging said engaging portion of said switch means during rotation ofsaid carrier for moving said switch means to said actuated position,said selector members being respectively associated with said printingsections; and means connecting said carrier with said printing rollerfor rotation in timed relation so that each printing section of saidprinting form is located opposite said pressure roller when theassociated selector member actuates said switch means whereby printingsections selected by operation of the respective selector member areprinted adjacent each other on the copy sheet.

3. In a duplicating machine, in combination, a rotary printing roller;means for securing to said printing roller a printing form having aplurality of printing sections; drive means for rotating said printingroller; a rotary pressure roller cooperating with said printing roller;movable support means for supporting said pressure roller for movementto and from a printing position in close proximity to said printingroller; operating means connected to said movable support for moving thesame and thereby said pressure roller to and from said printingposition, and including electromagnetic means; means for feeding a copysheet between said rollers, and for holding the copy sheet stationarywhen the same is not transported by said rollers in said printingposition; a first rotary carrier; a second rotary carrier axiallyadjacent said first rotary carrier; means for connecting said secondcarrier to said first carrier in a plurality of angularly displacedpositions respectively associated with said printing sections; first andsecond switch means respectively mounted on said first and secondcarriers, each switch means having an engaging portion moving along acircular path during rotation of said carriers, said switch means beingelectrically connected to said electromagnetic means and being movableto an actuated position for controlling said electromagnetic means toactuate said operating means; a support located adjacent said rotarycarriers; a set of manually operable selector members mounted along acircle on said support for movement independently of each other in axialdirection of said carriers between an inoperative position, and anoperative position projecting into the path of movement of said engagingportions of said switch means, each selector member in operativeposition engaging said engaging portions of said switch means duringrotation of said carriers for moving said switch means to said actuatedposition, said selector members being respectively associated with saidprinting sections; and means connecting said first carrier with saidprinting roller for rotation in timed relation so that each printingsection of said printing form is located opposite said pressure rollerwhen the associated selector member actuates said first switch meanswhereby printing sections selected by operation of the respectiveselector member are printed adjacent each other on the copy sheet.

4. In a duplicating machine, in combination, a rotary printing roller;means for securing to said printing roller a printing form having aplurality of printing sections; drive means for rotating said printingroller; a rotary pressure roller cooperating with said printing roller;movable support means for supporting said pressure roller for movementto and from a printing position in close proximity to said printingroller; operating means connected to said movable support for moving thesame and thereby said pressure roller to and from said printingposition, and including electromagnetic means; means for feeding a copysheet between said rollers, and for holding the copy sheet stationarywhen the same is not transported by said rollers in said printingposition; at least one rotary carrier having an axis of rotationtransverse to the axis of rotation of said printing roller; switch meansmounted on said carrier and having an engaging portion moving along acircular path during rotation of said carrier, said switch means beingelectrically connected to said electromagnetic means and being movableto an actuated position for controlling said electromagnetic means toactuate said operating means, said engaging portion being movable inradial direction for moving said switch means to said actuated position;a support located adjacent said rotary carrier; a set of manuallyoperable selector members mounted along a circle on said support formovement independently of each other in axial direction of said carrierbetween an inoperative position, and an operative position projectinginto the path of movement of said engaging portion of said switch means,each selector member in operative position engaging said engagingportion of said switch means during rotation of said carrier for movingsaid switch means to said actuated position, said selector members beingrespectively associated with said printing sections; and meansconnecting said carrier with said printing roller for rotation in timedrelation so that each printing section of said printing form is locatedopposite said pressure roller when the associated selector memberactuates said switch means whereby printing sections selected byoperation of the respective selector member are printed adjacent eachother on the copy sheet.

5. In a duplicating machine, in combination, a rotary printing roller;means for securing to said printing roller a printing form having aplurality of printing sections; drive means for rotating said printingroller; a rotary pressure roller cooperating with said printing roller;movable support means for supporting said pressure roller for movementto and from a printing position in close proximity to said printingroller; operating means connected to said movable support for moving thesame and thereby said pressure roller to and from said printingposition, and including electromagnetic means; means for feeding a copysheet between said rollers, and for holding the copy sheet stationarywhen the same is not transported by said rollers in said printingposition; a first rotary carrier; 21 second rotary carrier axiallyadjacent said first rotary carrier; a spring loaded stepping mechanismconnecting aid first carrier w t s s c n a ri r n inc i g a couplingmember tending to assume a coupling position so that said carriers arecoupled to each other for rotation, and being movable to o. releasingposition in which said second carrier is temporarily disconnected fromsaid first carrier and is angularly turned by said stepping mechanismone step relative to said first carrier, said second carrier beingstep-wise movable between a plurality of angularly turned positionsrespectively associated with said printing sections; a stationarycontrol member located in the path of movement of said coupling memberso that said coupling member is moved once during each revolution tosaid releasing position so that said second carrier angularly turns to asuccessive position during each revolution of said first carrier member;a first switch means mounted on said first carrier, and a second switchmeans mounted on said second carrier, each switch means having anengaging portion moving along a circular path during rotation of saidcarriers, each of said switch means being electrically connected to saidelectromagnetic means and being movable to an actuated positioncontrolling said electromagnetic means to actuate said operating means;a support located adjacent said rotary carriers; a set of manuallyoperable selector members mounted along a circle on said support formovement independently of each other in axial direction of said carriersbetween an inoperative position and an operative position projectinginto the paths of movement of said engaging portions of said first andsecond switch means, each selector member in operative position engagingsaid engaging portions of said first and second switch means duringrotation of said carriers for moving said switch means to said actuatedpositions, said selector members being respectively associated with saidprinting sections; and means connecting said first carrier with saidprinting roller for synchronous rotation so that each printing sectionof said printing form is located opposite said pressure roller when theassociated selector member actuates said first switch means whereby thesame printing section selected by operation of the respective selectormember is printed on the copy sheet during each revolution of saidprinting roller under the control of said first switch means, andwhereby successive printing sections are printed 011 the copy sheetadjacent the imprint of said first printing section during consecutiverevolutions of said printing roller under control of said second switchmeans.

6. In a duplicating machine, in combination, a rotary printing roller;means for securing to said printing roller a printing form having aplurality of printing sections; drive means for rotating said printingroller; a rotary pressure roller cooperating with said printing roller;movable support means for supporting said pressure roller for movementto and from a printing position in close proximity to said printingroller; operating means connected to said movable support for moving thesame and thereby said pressure roller to and from said printingposition, and including electromagnetic means; means for feeding a copysheet between said rollers, and for holding the copy sheet stationarywhen the same is not transported by said rollers in said printingposition; a first rotary carrier; a second rotary carrier axiallyadjacent said first rotary carrier; a spring loaded stepping mechanismconnection said fist carrier with said second carrier and including acoupling member tending to assume a coupling position so that saidcarriers are coupled to each other for rotation, and being movable to areleasing position in which said second carrier is temporarily dis--connected from said first carrier and is angularly turned by saidstepping mechanism one step relative to said first carrier, said secondcarrier being step-wise movable between a plurality of angularly turnedpositions respectively associated with said printing sections; astationary control member movable between an inoperative position, andan operative position located in the path of movement of said couplingmember so that said coupling member is moved once during each revolutionto said releasing position so that said second carrier angularly turnsto a successive position during each revolution of said first carriermember when said control member is in said operative position; a firstswitch means mounted on said first carrier, and a second switch meansmounted on said second carrier, each switch means having an engagingportion moving along a circular path during rotation of said carriers,each of said switch means being electrically connected to saidelectromagnetic means and being movable to an actuated positioncontrolling said electromagnetic means to actuate said operating means;a support located adjacent said rotary carriers; a set of manuallyoperable selector members mounted along a circle on said support formovement independently of each other in axial direction of said carriersbetween an inoperative position and an operative position projectinginto the paths of movement of said engaging portions of said first andsecond switch means, each selector member in operative position engagingsaid engaging portions of said first and second switch means duringrotation of said carriers for moving said switch means to said actuatedpositions, said selector members being respectively associated with saidprinting sections; and means connecting said first carrier with saidprinting roller for synchronous rotation so that each printing sectionof said printing form is located opposite said pressure roller when theassociated selector member actuates said first switch means whereby thesame printing section selected by operation of the respective selectormember is printed on the copy sheet during each revolution of saidprinting roller under the control of said first switch means, andwhereby successive printing sections are printed on the copy sheetadjacent the imprint of said first printing section during consecutiverevolutions of said printing roller under control of said second switchmeans.

7. In a duplicating machine, in combination, a rotary printing roller;means for securing to said printing roller a printing form having aplurality of printing sections; drive means for rotating said printingroller; a rotary pressure roller cooperating with said printing roller;movable support means for supporting said pressure roller for movementto and from a printing position in close proximity to said printingroller; operating means connected to said movable support for moving thesame and thereby said pressure roller to and from said printingposition, and including electromagnetic means; means for feeding a copysheet between said rollers, and for bolding the copy sheet stationarywhen the same is not transported by said rollers in said printingposition; a first rotary carrier; a second rotary carrier axiallyadjacent said first rotary carrier; a spring loaded stepping mechanismconnecting said first carrier with said second carrier and including acoupling member tending to assume a coupling position so that saidcarriers are coupled to each .other for rotation, and being movable to areleasing position in which said second carrier is temporarilydisconnected from said firstcarrier and is angularly turned by saidstepping mechanism one step relative to said first carrier in adirection opposite the direction of rotation of said first carrier, saidsecond carrier being step-wise movable between a plurality of angularlyturned positions respectively associated with said printing sections; astationary control member movable between an inoperative position, andan operative position located in the path of movement of said couplingmember so that said coupling member is moved once during each revolutionto said releasing position so that said second carrier angularly turnsto a successive position during each revolution of said first carriermember when said control member is in said operative position; a firstswitch means mounted onsaid first carrier, and a second switch meansmounted on said second carrier, each switch means having an engagingportion moving along a circular path during rotation of said carriers,each of said switch means being electrically connected to saidelectromagnetic means and being movable to an actuated positioncontrolling said electromagnetic means to actuate said operating means;a support located adjacent said rotary carriers; a set of manuallyoperable selector members mounted along a circle on said support formovement independently of each other in axial direction of said carriersbetween an inoperative position and an operative position projectinginto the paths of movement of said engaging portions of said first andsecond switch means, each selector member in operative position engagingsaid engaging portions of said first and second switch means duringrotation of said carriers for moving said switch means to said actuatedpositions, said selector members being respectively associated with saidprinting sections; and means connecting said first carrier with saidprinting roller for synchronous rotation so that each printing sectionof said printing form is located opposite said pressure roller when theassociated selector member actuates said first switch means whereby thesame printing section selected by operation of the respective selectormember is printed on the copy sheet during each revolution of saidprinting roller under the control of said first switch means, andwhereby successive printing sections are printed on the copy sheetadjacent the imprint of said first printing section during consecutiverevolutions of said printing roller under control of said second switchmeans.

8. In a duplicating machine, in combination, a rotary printing roller;means for securing to said printing roller a printing form having aplurality of printing sections; drive means for rotating said printingroller; a rotary pressure roller cooperating with said printing roller;movable support means for supporting said pressure roller for movementto and from a printing position in close proximity to said printingroller; operating means connected to said movable support for moving thesame and thereby said pressure roller to and from said printingposition, and including electromagnetic means; means for feeding a copysheet between said rollers, and for holding the copy sheet stationarywhen the same is not transported by said rollers in said printingposition; a first rotary carrier; a second rotary carrier axiallyadjacent said first rotary carrier; a spring loaded stepping mechanismconnecting said first carrier with said second carrier and including acoupling member tending to assume a coupling position so that saidcarriers are coupled to each other for rotation, and being movable to areleasing position in which said second carrier is temporarilydisconnected from said first carrier and is angularly turned by saidstepping mechanism one step relative to said first carrier, said secondcarrier being step-wise movable between a plurality of angularly turnedpositions respectively associated with said printing sections; astationary control member located in the path of movement of saidcoupling member so that said coupling member is moved once during eachrevolution to said releasing position so that said second carrierangularly turns to a successive position during each revolution of saidfirst carrier member; a first switch means mounted on said firstcarrier, and a second switch means mounted on said second carrier, eachswitch means having an engaging portion moving along a circular pathduring rotation of said carriers, each of said switch means beingelectrically connected to said electromagnetic means and being movableto an actuated position controlling said electromagnetic means toactuate said operating means; a support located adjacent said rotarycarriers; a set of manually operable selector members mounted along acircle on said support for movement independently of each other in axialdirection of said carriers between an inoperative position, a firstoperative position projecting into the path of movement of said engagingportion of said first switch means, a second operative positionprojecting into the path of movement of said engaging portion of saidsecond switch means, and a third operative position projecting into thepaths of movement of said engaging portions of said first and secondswitch means, each selector member in the respective operative positionthereof eitecting movement of the respective associated switch means tosaid actuating position of the same, said selector members beingrespectively associated with said printing sections; and meansconnecting said first carrier with said printing roller for synchronousrotation so that each printing section of said printing form is locatedopposite said pressure roller when the associated selector memberactuates said first switch means whereby the same printing sectionselected by operation of the respective selector member is printed onthe copy sheet during each revolution of said printing roller under thecontrol of said first switch means, and whereby successive printingsections are printed on the copy sheet during consecutive revolutions ofsaid printing roller under control of said second switch means.

9. A duplicating machine as set forth in claim 8 and including arrestingmeans for arresting each of said selector members on said support ineach of said inoperative and operative positions of the same,

10. In a duplicating machine, in combination, a rotary printing roller;means for securing to said printing roller a printing form having aplurality of printing sections; drive means for rotating said printingroller; a rotary pressure roller cooperating with said printing roller;movable support means for supporting said pressure roller for movementto and from a printing position in close proximity to said printingroller; operating means connected to said movable support for moving thesame and thereby said pressure roller to and from said printingposition, and including electromagnetic means; meansfor feeding a copysheet between said rollers, and for holding the copy sheet stationarywhen the same is not transported by said rollers in said printingposition; a first rotary carrier; a second rotary carrier axiallyadjacent said first rotary carrier; a spring loaded stepping mechanismconnecting said first carrier with said second carrier and including acoupling member tending to assume a coupling position so that saidcarriers are coupled to each other for rota-tion, and being movable to areleasing position in which said second carrier is temporarilydisconnected from said first carrier and is angularly turned by saidstepping mechanism one step relative to said first carrier, said secondcarrier being step-wise movable between a plurality of angularly turnedpositions respectively associated with said printing sections; astationary control member located in the path of movement of saidcoupling member so that said coupling member is moved once during eachrevolution to said releasing position so that said second carrierangularly turns to a successive position during each revolution of saidfirst carrier member; a first switch means mounted on said firstcarrier, and a second switch means mounted on said second car rier, eachswitch means having an engaging portion moving along a circular pathduring rotation of said carriers, each of said switch means beingmovable to an actuated position; first and second circuit meansrespectively connecting said first and second switch means with saidelectromagnetic means so that said electromagnetic means actuate saidoperating means when each of said switch means is moved to said actuatedposition, each of said circuit means including a manually operatedswitch for selectively disconnecting said first switch means and saidsecond switch means; a support located adjacent said rotary carriers; aset of manually operable selector members mounted along a circle on saidsupport for movement independently of each other in axial direction ofsaid carriers between an inoperative position and an operative positionprojecting into the paths of movement of said engaging portions of saidfirst and second switch means, each selector member in operativeposition engaging said engaging portions of said first and second switchmeans during rotation of said carriers for movingsaid switch meanstosaidactuated positions, saidselector members being respectively associatedwith said printing sections; and means connecting said first carrierwith said printing roller for synchronous rotation so that each printingsection of said printing form is located opposite saidpressurerollerwhen the associated selector member actuates said first switch meanswhereby the same printing section selected byoperation of therespectiveselector member is printed on the copy sheet during each revolution-ofsaid printing roller under the control of said first switch means, andwhereby successive printing sections are printed on the copy sheetadjacent the imprint of said first printing section during consecutiverevolutions of said printing roller under control of said second switchmeans.

11. In a duplicating machine, 'in combination, a rotary printing roller;means for securing to said printing roller a printing form havingaplurality of printing sections; drive means 'for rotating said printingroller; a rotary pressure roller cooperating with saidpr'intingroller;.movable support means for supporting said pressure rollerformovement to and from a printing position inclose proximity to saidprinting roller; operatingmeans connected to said movable support formoving the same and thereby said pressure roller ,to'and from saidprinting position, and including electromagnetic means; means forfeeding a copy sheet between said rollers, and for holding the copysheet stationary, when the same is not transported by said rollers insaid ,printing position; a first rotary carrier; a second rotarycarrieraxially adjacent said first rotary carrier; a spring loaded steppingmechanism connecting said first carrier with said second carrier andincluding acoupling member tending to assume a coupling position so thatsaid carriers are coupled to each other for rotation, and being movableto a releasing position in which said second carrier is temporarilydisconnected from said first carrier and is angularly turned by saidstepping mechanism one step relative to said first carrier in adirection opposite the direction of rotation of said first carrier, saidsecond carrier being step-wise movable between ,a plurality of angularlyturned positions respectively associated with said printing sections; astationary control member movable vbetween an inoperative position, andan operative position located in the path of movementof said couplingmember so that said coupling member is moved once during each revolutionto said releasing position so that said second carrier angularly turnsto asuccessive position during each revolution of said first carriermember when said control member is in said operative position; a firstswitch means mounted on said first carrier, and a second switch meansmounted on said second carrier, each switch means having an engagingportion moving along a circular path during rotation of said carriers,each of said switch means being movable to an actuated position; firstand second circuit means respectively connecting said first and secondswitch means with said elect ma m an tha said eleq m etiomean actuatesaid operating means when each of said switch means is moved to saidactuated position, eachof said circuit means including a manuallyoperated switch for selectively disconnecting said'first switch meansand said second switch means; a support located adjacent said rotarycarriers; a set of manually operable selector members mounted along acircle on said support 'for movement independently of each other inaxial direction of said carriers between an inoperative position and anoperative position projecting into the paths of movement of saidengaging portions of said first andsecond switch means, each selectormember in operative position engaging said engaging portions ofsaidfirst and second switch means during rotation of said carriersfor'moving said switch means to said actuated positions, saidselector'members being respectively associated with said printingsections; and means connecting said first carrier with 14 said printingroller for-synchronous rotation so that each printingsection of'saidprinting form is located opposite saidpressure roller when-theassociated selector member actuates said first switch means whereby thesame printing section selected by operation of the respective selectormember is printed on the copy sheet during each revolution'of saidprinting roller under the control of said first switch means, andwhereby successive printing sections are printed on the copy sheetadjacent the imprint of said first printing section during consecutiverevolutions of saidprinting roller under control of said second switchmeans.

12. In a duplicating machine, in combination, a rotary printing roller;means for securing to said printing roller a printing form having aplurality of printing sections; drive means for rotatingsaid printingroller; a rotary pressure roller cooperating with said printing roller;movable-support means forsupporting said pressure roller for movement toand from a printing position in close proximity to said printing roller;operating means connected to said movable support for moving the sameand thereby said pressure rollerto and from said printing position, andincluding electromagnetic means; means for feeding a copy sheet betweensaid rollers, and for holding the copysheet stationary when the same isnot transported by said rollers in said printing position; a firstrotary carrier; a second rotary carrier axially adjacent said firstrotary carrier; a spring loaded stepping mechanism connecting said firstcarrier with said second carrier and including a coupling member tendingto assume a coupling position so that said carriers are coupled to eachother for rotation, and being movable to a releasing position in whichsaid second carrier is temporarily disconnected from said first carrierand is angularly turned by said stepping mechanism one step relative tosaid first carrier, said second carrier'being step-wise movable betweena plurality of angularly turned positions respectively associated withsaid printing sections; a stationary control member located'in the pathof movement of said couplingrnember so that said coupling member ismoved once during each revolution to said releasing position so thatsaid second carrier angularly turns to a successive position during eachrevolution of said first carrier member; a first switch means mounted onsaid first carrier, and a second switch means mounted -on said secondcarrier, each jswitch means-having-an engaging portion moving alongacircular path-during rotation of said carriers, each of said switchmeans 'beingmovable to an actuated position; first and secondcircuitmeans respectively connecting said first and second switch means withsaidelectromagnetic means so that said electromagnetic means actuatesaid operating means when each of said switch means is moved-to saidactuated position, each of said circuit means including a manuallyoperated switch for selectively disconnecting said first switch meansand said second switch .means; a support located adjacent said rotarycarriers; aset of manually operable selector members mounted alonga'circle on said support for movement independentlyof each other inaxial direction of said carriers between an inoperative position, afirst operative position projecting into the path of movement ofsaid'engaging portion of said first switch means, a second operativepositionprojecting into the path of movement of said engaging portion ofsaid second switch means, and a third operative position projecting intothe paths of movement of said engaging portions of said first and secondswitch means, each selector member in the respective operative positionthereof effecting movement of the respective associated switch means tosaid actuating position of the same, said selector members beingrespectively associated with said printing sections; and meansconnecting said first carrier with said printing roller for synchronousrotation so that each printing section of said printing form is locatedopposite said pressure roller when the associated selector memberactuates said first switch means whereby the same printing sectionselected by operation of the respective selector member is printed onthe copy sheet during each revolution of said printing roller under thecontrol of said first switch means, and whereby successive printingsections are printed on the copy sheet during consecutive revolutions ofsaid printing roller under control of said second switch means.

13. A duplicating machine as set forth in claim 7 and including a shaftcoaxial with said first and second carriers, said shaft being fixedlyconnected to said first car- 'rier, and turnably supporting said secondcarrier; and wherein said shaft is connected to said printing roller forrotation therewith.

14. A duplicating machine as set forth in claim 13 wherein said shaftextends in a direction perpendicular to the axis of rotation of saidprinting roller; and including gear transmission means connecting saidprinting roller with said shaft.

15. A duplicating machine as set forth in claim 13 wherein said couplingmember is mounted on said first carrier, wherein said stepping mechanismincludes a stepping wheel secured to said second carrier and engaged bysaid coupling member in coupling position, and a spiral springconnecting said stepping wheel with said shaft.

16. In a duplicating machine, in combination, a rotary printing roller;means for securing to said printing roller a printing form having aplurality of printing sections; drive means for rotating said printingroller; a rotary pressure roller cooperating with said printing roller;movable support means for supporting said pressure roller for movementto and from a printing position in close proximity to said printingroller; operating means connected to said movable support for moving thesame and thereby said pressure roller to and from said printingposition, and including electromagnetic means; means for feeding a copysheet between said rollers, and for holding the copy sheet stationarywhen the same is not transported by said rollers in said printingposition; a first rotary carrier; a second rotary carrier axiallyadjacent said first rotary carrier; a spring loaded stepping mechanismconnecting said first carrier. with said second carrier and including acoupling member tending to assume a coupling position so that saidcarriers are coupled to each other for rotation, and being movable to areleasing position in which said second carrier is temporarilydisconnected from said first carrier and is angularly turned by saidstepping mechanism one step relative to said first carrier, said secondcarrier being pairs-of slip rings; asupport located adjacent said rotarycarriers; a set of manually operable selector members mounted along acircle on said support for movement independently of eachj other inaxial direction of said carriers between an: inoperative position and anoperative position projecting into the paths of movement of saidengaging portions of said first and second switch means, each selectormember in operative position engaging said engaging portions of saidfirst and second switch means during rotation of said carriers formoving said switch means to said actuated positions, said selectormembers being respectively associated with said printing sections; andmeans connecting said first carrier with said printing roller forsynchronous-rotation so that each printing section of said printing formis located opposite said pressure roller when the associated selectormember actuates said first switch means whereby the same printingsection selected by operation of the respective selector member isprinted on the copy sheet during each revolution of said printing rollerunder the control of said first switch means, and whereby successiveprinting sections step-wise movable between a plurality of angularlyturned positions respectively associated with said printing sections; astationary control member located in the path of movement of saidcoupling member so that said coupling member is moved once during eachrevolution to said releasing position so that said second carrierangularly turns to a'successive position during each revolution of saidfirst carrier member; a first switch means mounted on said firstcarrier, and a second switch means mounted on said second carrier, eachswitch means having an engaging portion moving along a circular pathduring rotation of said carriers, each of said switch means beingmovable to an actuated position; first and second circuit meansrespectively connecting said first and second switch means with saidelectromagnetic means so that said electromagnetic means actuate saidoperating means when said first and second circuit means including apair of slip rings, said pairs of slip rings being respectively mountedon said first and second rotary carrier means, each of said first andsecond circuit means further including a pair of slide contactsrespectively engaging said are printed on the copy sheet adjacent theimprint of said first printing section during consecutive revolutions ofsaid printing roller under control of said second switch means.

17. In a'duplicating machine, in combination, a rotary printing roller;means for securing to said printing roller a printing form having aplurality of printing sections; drive means for rotating said printingroller; a rotary pressure roller cooperating with said printing roller;movable support means for supporting said pressure roller formovement toand from a printing position in close proximity tosaid printing roller;operating means connected to said movable support for moving the sameand thereby said pressure roller to and from said printing position, andincluding electromagnetic means; means for feeding a copy sheet betweensaid rollers, and for holding the copy sheet between said rollers, andfor holding the copy sheet stationary when the same is not trans portedby said rollers in said printing position; a first rotary carrier; 'asecond rotary carrier axially adjacent said first rotary carrier; aspring loaded stepping mechanism connecting said fist carrier with saidsecond carrier and including a coupling member tending to assume acoupling position so that said carriers are coupled to each other forrotation, and being movable to a releasing position in which said secondcarrier is temporarily disconnected from said first carrier and isangularly turned by said stepping mechanism one step relative to saidfirst carrier in a direction opposite the direction of rotation of saidfirst carrier, said second carrier being step-wise movable between aplurality of angularly turned positions respectively associated withsaid printing sections; a stationary control member movable between aninoperative position, and an operative position located in the path ofmovement of said coupling member so that said coupling member is movedonce during each revolution to said releasing position so that saidsecond carrier angularly turns to a successive position during eachrevolution of said first carrier member When said control member is insaid operative position; a first switch means mounted on said firstcarrier, and a second switch means mounted on said second carrier, eachswitch means having an engaging portion moving along a circular pathduring rotation of said carriers, each of said switch means beingelectrically connected to said electromagnetic means and being movableto an actuated position controlling said electromagnetic means toactuate said operating means; a support located adjacent said rotarycarriers, a set of manually operable selector members mounted along acircle on said support for movement independently of each other in axialdirection of said carriers between an inoperative position, a firstoperative position projecting into the path of movement of said engagingportion of said first switch means, a second operative position projecting into the path of'movement of said engaging portion of said secondswitch means, and a third operative position projecting into the pathsof movement of said engaging portions of said first and second switchmeans, each selector member in the respective operative position thereofefiecting movement of the respective associated switch means to saidactuating position of the same, said selector members being respectivelyassociated with said printing sections; and means connecting said firstcarrier with said printing roller for synchronous rotation so that eachprinting section of said printing form is located opposite said pressureroller when the associated selector member actuates said first switchmeans whereby the same printing section selected by operation of therespective selector member is printed on the copy sheet during eachrevolution of said printing roller under the control of said firstswitch means, and whereby successive printing sections are printed onthe copy sheet adjacent the imprint of said first printing sectionduring consecutive revolutions of said printing roller under control ofsaid second switch means.

' 18. A duplicating machine as set forth in claim 17 wherein each ofsaid carriers includes a flange and wherein the respective switch meansis secured to said flange, wherein said engaging portions of said firstand second switch means are spaced the same distance in radial directionfrom the axis of rotation of said first and second carrier; wherein saidsupport is a plate having a plurality of axially extending guide meansarranged in a circle thereon, each guide means slidably supporting oneof said selector members.

19. A duplicating machine as set forth in claim 18 wherein each of saidselector members includes an operating portion cooperating with saidengaging portions of said first and second switch means, said operatingportions being located on one side of said plate, and wherein each ofsaid selector members includes a button portion for manual engagementlocated on the other side of said plate.

20. In a duplicating machine, in combination, a rotary printing roller;means for securing to said printing roller a printing form having aplurality of printing sections; drive means for rotating said printingroller; a rotary pressure roller cooperating with said printing roller;movable support means for supporting said pressure roller for movementto and from a printing position in close proximity to said printingroller; operating means connected to said movable support for moving thesame and thereby said pressure roller to and from said printingposition, and including electromagnetic means; means for feeding a copysheet between said rollers, and for holding the copy sheet stationarywhen the same is not transported by said rollers in said printingposition; a first rotary carrier; a second rotary carrier; a steppingmechanism connecting said first carrier with said second carrier andincluding a coupling member tending to assume a coupling position sothat said carriers are coupled to each other for rotation, and beingmovable to a releasing position in which said second carrier istemporarily disconnected from said first carrier and is angularly turnedby said stepping mechanism one step relative to said first carrier in adirection opposite the direction of rotation of said first carrier, saidsecond carrier being step-wise movable between a plurality of angularlyturned positions respectively associated with said printing sections; astationary control member movable between an inoperative position, andan operative position located in the path of movement of said couplingmember so that said coupling member is moved once during each revolutionto said releasing position so that said second carrier angularly turnsto a successive position during each revolution of said first carriermember when said control member is in said operative position; a firstswitch means mounted on said first carrier, and a second switch meansmounted on said second carrier, each switch means having an engagingportion moving along a circular path during rotation of said carriers,each of said switch means being electrically connected to saidelectromagnetic means and being movable to an actuated positioncontrolling said electromagnetic means to actuate said operating means;a support; a set of manually operable selector members mounted on saidsupport for movement independently of each other between an inoperativeposition and an operative position projecting into the paths of movementof said engaging portions of said first and second switch means, eachselector member in operative position engaging said engaging portions ofsaid first and second switch means during rotation of said carriers formoving said switch means to said actuated positions, said selectormembers being respectively associated with said printing sections; andmeans connecting said first carrier with said printing roller forsynchronous rotation so that each printing section of said printing fromis located opposite said pressure roller when the associated selectormember actuates said first switch means whereby the same printingsection selected by operation of the respective selector member isprinted on the copy sheet during each revolution of said printing rollerunder the control of said first switch means, and whereby successiveprinting sections are printed on the copy sheet during consecutiverevolutions of said printing roller under control of said second switchmeans.

References Cited in the file of this patent UNITED STATES PATENTS2,210,021 Breitling Aug. 6, 1940 2,815,711 Ritzerfeld Dec. 10, 19572,823,604 Ritz-erfeld Feb. 18, 1958 2,843,039 Ritzerfeld July 15, 1958

